#!/usr/bin/env python3
from __future__ import annotations

import argparse
import sys
from pathlib import Path

from config import Config, load_config, validate_config
from server_service import ServerConfig, ServerService


def build_service_config(config: Config, config_path: Path) -> ServerConfig:
    return ServerConfig(
        host=config.host,
        port=config.port,
        server_name=config.server_name,
        server_description=config.server_description,
        max_players=config.max_players,
        log_verbosity=config.log_verbosity,
        admin_port=config.admin_port,
        bans_path=str(config_path.parent / "bans.json"),
        enable_gns_transport=config.enable_gns_transport,
        gns_bridge_path=config.gns_bridge_path,
    )


def main(argv: list[str] | None = None) -> int:
    parser = argparse.ArgumentParser(description="Commonwealth Online dedicated server")
    parser.add_argument(
        "--config",
        default="commonwealth-server.json",
        help="Path to the server JSON configuration file",
    )
    args = parser.parse_args(argv)

    config_path = Path(args.config).expanduser().resolve()
    try:
        config = load_config(str(config_path))
    except Exception as error:
        print(f"[ERROR] Could not load {config_path}: {error}", file=sys.stderr)
        return 2

    valid, errors = validate_config(config)
    if not valid:
        for error in errors:
            print(f"[ERROR] {error}", file=sys.stderr)
        return 2

    service = ServerService(build_service_config(config, config_path))
    service.add_log_listener(lambda message, **_: print(message, flush=True))
    try:
        service.serve_forever()
    except KeyboardInterrupt:
        pass
    finally:
        service.stop()
    return 0


if __name__ == "__main__":
    raise SystemExit(main())